/*
 * Copyright 2009 André Luiz Alves Moraes
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * */
package org.alamoraes.cmdutils.parser;

/**
 *
 * @author andre
 */
public class ArrayWrapper<T> {
    private int current;
    private int lastCurrent;
    private T[] array;

    public ArrayWrapper(T[] array) {
        this.array = array;
        current= -1 ;
        lastCurrent = -1;
    }

    public void saveCurrent() {
        lastCurrent = current;
    }

    public void backToLastSaved() {
        current = lastCurrent;
    }

    public T first() {
        current = 0;
        return getItem();
    }

    public T last() {
        current = array.length - 1;
        return getItem();
    }

    public T moveNext() {
        current++;
        return getItem();
    }

    public T movePrior() {
        current--;
        return getItem();
    }

    public boolean isEof() {
        return current == array.length - 1;
    }

    public T getItem() {
        return array[current];
    }
}
